Re: Number validation issue

Discussion in 'Python' started by Alec Taylor, Feb 22, 2013.

  1. Alec Taylor

    Alec Taylor Guest

    Out[1]: '0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
    24 25 26 27 28 29'

    In [2]: [not len(x) >= 2 and len(x)<=25 for x in _]
    Out[2]: [True]*79 # shorthand to prevent spam


    I trust you can see the error now!

    On Sat, Feb 23, 2013 at 2:09 AM, Morten Engvoldsen <> wrote:
    > Hi ,
    > I have wrote the below code to validate a number using modulus 10 and 11:
    >
    > def is_valid_number(checknum, mod):
    > if mod == 10:
    > if not len(checknum) >= 2 and len(checknum) <=25:
    > return False
    > number = tuple(int(i) for i in reversed(str(checknum)) )
    > return (sum(int(num) * 2 for num in number[1::2]) % 10) == 0
    > elif mod == 11:
    > if not len(checknum)!= 11:
    > return False
    > weights = [5, 4, 3, 2, 7, 6, 5, 4, 3, 2, 1]
    > return (sum(w * int(x) for w, x in zip(weights, checknum)) % 11) ==
    > 0
    >
    > is_valid_number("12345678217", 10)
    >
    > The above code is able to validate 25 length number for modulus 10 , but for
    > modulus 11 i have done the validation only for 11 digit, Since for modulus
    > 11 the weight should be in
    > .............4,3,2,7,6, 5, 4, 3, 2, 7, 6, 5, 4, 3, 2, 1 in this format.
    >
    > Could you please let me know how can i validate the 25 length number for
    > modulus 11 with weight ...............4,3,2,7,6, 5, 4, 3, 2, 7, 6, 5, 4, 3,
    > 2, 1 in this format.
    >
    > Regards,
    > Morten
    >
    >
    >
    > --
    > http://mail.python.org/mailman/listinfo/python-list
    >
     
    Alec Taylor, Feb 22, 2013
    #1
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